Weather stripping for windows having vertically slidable sashes



May 11. 1954 w. FRIEDMAN 2,677,861 WEATHER STRIPPING FOR wmnows HAVINGVERTICALLY SLIDABLE SASHES Filed June 30, 1952 2 Sheets-Sheet lINVENTOR.

Mum; Fjf/EDM M/ AT TOE/VS V May 11. 1954 w FRIEDMA N 2,677,861 WEATHERSTRIPPING FOR WINDOWS HAVING VERTICALLY SLIDABLE SASHES 2 Sheets Sheet 2Filed June 30, 1952 INVENTOR. WILLIAM fk/EDMM 9 BY Patented May 11, 1954UNITED STAT ATET OFFICE WEATHER STRIPPIN G FOR WINDOWS HAV- INGVERTICALLY SLIDABLE SASHES William Friedman, Denver, "0010., assignor ofonefourth to Leo Cohen, and of Denver, Colo.

H. Weiss, one-fourth to Dave one-fourth to David Lifshutz, all

This invention relates to improvements in windows and has reference moreparticularly to improvements in weather stripping for windows havingvertically slidable sashes.

Windows of the type having upper and lower window sashes that arecounterweighted by sash weights and ropes or chains, have beenextensively employed in all forms of buildings but more particularly inresidences and oiiice buildings.

the breakage of the ropes or other tension members that connect thesashes with the sash weight. Windows of this construction are alsodifiicult to Weatherstrip and as a result they are seldomweatherstripped and therefore cause much heat losses in winter.

Attempts have been made to produce satisfactory windows that do notrequire sash weights and various designs for this purpose are known.

It is the object of this invention to produce a double sash, verticallyadjustable window which will not require sash weights and which shall beprovided with improved Weatherstrip means built into the jambs and whichproduce windows that are easily operated and which limit the passage ofair between the jambs and sash to a negligible amount.

The above and other objects that will appear as the description proceedsare attained by means of a construction and an arrangement of parts thatwill now be described in detail for which purpose reference will be hadto the accompanying drawings in which the invention has been illustratedand in which Figure 1 is a partial front elevational view of a windowconstructed in accordance with this invention part being broken away tobetter disclose the same;

Figure 2 is a section taken on line 2-2, Fig-- ure 1;

Figure 3 is a. section taken on line 33, Figure 1;

Figure 4 is a perspective view, partly in section, showing a portion ofthe window jamb with the metal weatherstrips in place;

Figure 4A is a diagrammatic detail to an enlarged scale;

Figure 5 is a view similar to that shown in Figure 4 and shows a jambhaving a metal covering with built in weatherstrips;

Figure 5A is a diagrammatical detail to an enlarged scale;

Figure 6 is a diagrammatic view showing how iii) the lower sash can beraised and also tilted inwardly to efiect ventilation and Figure 7 is adiagram showing how the lower sash can be removed from the window framefor cleaning and repair.

Referring now to the drawin numeral I0 designates the window trim and Hthe jambs while the lower and the upper sashes are designatedrespectively by LS and US. The side rails or stiles have been designatedby I2. The two jambs in the window frame differ from the ordinary J'ambsconstruction and have been shown to an enlarged scale in Figures 4A and5A. Referring first to Figure 4 which shows an all wood construction itwill be seen that the jamb is provided with a long shallow groove l3that forms a guide for the lower sash in a manner that will behereinafter explained. The jamb surface is also provided with a widegroove M from whose bottom two spaced ribs l5 may project. A T- shapedstrip i6 is positioned along the middle line of groove it. Where ribs l5are used, between the ribs as shown in Figure 4, long channel shapedmetal weatherstrips I"! are positioned in the spaces between the outeror side walls of groove 14 and the ends of the cross bar of the T-stripwhich is held in place by screws [8. One side or flange of each channelstrip H has its edge bent outwardly providing a narrow strip l8 thatfits underneath the outer end of the cross member of the T-strip.

A hard wood strip 26 is positioned in each channel to increase itsrigidity. Springs 2| are Positioned at spaced intervals along the lengthof the weatherstrips and urge them outwardly; when there is no forcetending to move the strips inwardly they occupy the position shown, inwhich the laterally projecting edge is in engagement with the undersurface of the top bar of the T-strip. In the drawing springs 2! havebeen shown as coil springs but in the actual construction they areformed from short sections of spring steel ribbon bowed into asemi-elliptical shape. It is to be understood that any suitable springsmay be substituted for those shown.

In Figure 5 the lamb is provided with a wide groove Ma, along one edgeof which is a rabbet [3a. The entire inner surface of the lamb iscovered with a metal sheet 22 which may be formed from aluminum orcopper and which is bent into the cross sectional shape shown in Figures5 and 5a, the latter being a diagrammatic showing added for conveniencein describing the shape. The sheet metal plate 22 is formed by specialmachines into the shape shown and when finished has a return bend 23that terminates in a downwardly extending wall 24 which in turnterminates in the bottom 25 whose other edge is joined to the upwardlyextending wall 26 that is formed into the T-bar Mia, and passes thencedownwardly as shown at 21 where it joins bottom 28 which in turn joinswith the upwardly extending wall 29 that terminates in the reverselybent flange 3B and is further formed into groove 13a. It will beobserved that when the metal sheet is completed it forms two groovessimilar to those shown in Figure 4 and differs merely in this that ithas the reversely bent edges 23 and 30 which are absent in Figure 4.

The finished jambs form the sides of the win dow frame shown in Figure1.

Figure 2 shows the vertical stile of the lower sash in its positionrelative to the jamb. The vertical stiles of both sashes are providedwith a friction device comprising two rollers R that are carried by theU-shaped channel 3| that is slidable in the larger channel 32 and ispressed outwardly by a spring. This device forms the subject ofcopending application Serial Number 296,413 filed by William Friedman onJune 30, 195 which is assigned to the assignees of this application andit will therefore not be described in detail in this application. Thelower sash is provided near its bottom with pins 33 that project intogroove [3. When the lower sash is in closed position pins 33 and rollersR on both sides are in grooves l3 and guide the sash in its verticalmovement. Rollers R are so mounted that the window sash may move freelyin an upward direction but they oppose a considerable resistance toforces tending to move the sash downwardly. Means such as screw 34,Figure 3, is provided for moving the rollers inwardly to a point wherethey no longer project into grooves l3 and the lower sash can then betilted as shown in Figure 6.

If the sash is to be entirely removed it is tilted about pins 33 untilits plane is substantially perpendicular to the window frame whereuponit is tilted to the position shown in Figure 7 and removed. It may bereplaced by a reverse procedure.

When the lower sash is in place a portion of the outside surface of thevertical stiles are in engagement with the bottom of one of thecorresponding channel shaped weatherstrips and a very tight seal is thusformed.

Figure 3 is a section taken through the upper sash at the placeindicated in Figure 1. The jamb has no groove corresponding to l3 forthe upper sash, which is guided by a stop 35 and by one of theweatherstrips. Rollers R serve, as explained in connection with the10Wer sash, to hold it in vertically adjusted position.

Applicant calls attention to the small block B shown in Figure 4. Thisblock is positioned between the top frame member of the lower sash andthe bottom frame member of the upper sash to block this opening throughwhich air would otherwise circulate.

Attention is directed to Figures 5 and 5A in connection with which it isexplained that although the metal covering 22 is shown as covering theentire inner surface of the jamb this is not essential. In most casesonly that portion between points 23 and 30 is employed and the resultingassembly is sold to factories or to contractors who position thisweather seal assembly in a suitable groove in the jamb.

In the drawing, parts comprising the portions numbered from 23 to 30have been shown as formed from sheet metal. It is applicants intentionto employ an extruded aluminum part for this purpose in which case parts26 and 21 become one part as in Figur 4.

What is claimed as new is:

A window of the type having vertically slidable upper and lower sasheshaving spaced stiles positioned in a window frame having spaced jambs,the stiles and jambs being in opposed slidable relation, the innersurfaces of the jambs having two spaced. parallel grooves extending theentire length thereof, elongated weatherstrips positioned in the groovesand mounted for transverse movement therein. means limiting the outwardmovement of the Weatherstrips to a point in which they have portionspositioned in the grooves at all times, springs positioned between thebottoms of the grooves and the weatherstrips urging them outwardly,window sashes positioned in the frame with the Outer surfaces of theirvertical stiles in engagement with corresponding weatherstrips, thejambs having each a groove on the inside of the inner Weatherstrip, pinsprojecting outwardly from the lower ends of the vertical sash stilesinto the last named grooves in the jamb-s forming guide means,additional guide means carried by the sash at points above the pins foroperative engagement with the last named grooves, the pins and the upperguide means guiding the vertical movement of the sash, and meansaccessible from the inside for retracting the upper guide means fromengagement in the grooves to permit the upper end of the sash to bemoved inwardly to provide a ventilating opening,

References Cited in the file of this patent UNITED STATES PATENTS

